A method for driving an oscillator at a quasi-uniform velocity

Zmeev, Dmitriy (2014) A method for driving an oscillator at a quasi-uniform velocity. Journal of Low Temperature Physics, 175 (1-2). pp. 480-485. ISSN 0022-2291

Full text not available from this repository.

Abstract

We describe a simple way to drive an actuator, comprising a superconducting coil moving in a static magnetic field, at a quasi-uniform velocity. The main objective is to avoid oscillations in this system with low damping, as they undermine the uniformity of the velocity. The method consists in calculating the force that should be exerted on the coil from the equation of motion and programming a waveform generator to produce the corresponding current through the coil. The method was tested on a device towing a grid through a closely fitted channel filled with superfluid 4He at temperatures below 100 mK. The motion of the grid over the distance of 4.3 cm at 10 cm/s resulted in oscillations of less than 50 micron in amplitude (or less than 1 mm/s in terms of velocity). The method can be applied to any oscillator.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Low Temperature Physics
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
68750
Deposited By:
Deposited On:
28 Feb 2014 16:51
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Mar 2020 03:49